Each one of our jewels comes with a guarantee certificate with the technical characteristics of the materials used during their creation process.

Each piece of jewelry is created by hand at our workshops in Madrid by our team of master craftsmen. The diamonds, precious stones, and pearls that we use undergo a rigorous selection process in order to obtain materials of the best quality; one of the cornerstones of Eugenio Lumbreras.

All the diamonds we work with are subject to the Kimberley Process Certification Scheme (KPCS). All diamonds up from half carat come with their own Certificate of Origin from Antwerp. Our fine stones have been extracted following the guidelines of international agreements.